After a lot of feedback from dealers and end-users, both domestically and internationally, we put together 3 new amplifiers to meet the needs of those customers that don’t quite need as much power as the C-Class amps. The new A-Class amps incorporate the same functions as the C-Class and have the same profile. We tweaked the appearance just a little with an anthracite heatsink treatment to bring a little extra flavor into our family of amps.

The crossover section from the C-Class amps is shared with the A-Class amps to keep excellent system flexibility. Each left/right channel pair features separate high-pass and low-pass crossovers with separate on/off switches. The range extends to 5kHz to include tweeter-happy frequencies. The crossovers used throughout the preamp section of the A-Class amps are 12dB/Octave.We kept the popular clipping indicator circuit which makes initial setup a simple task.

The A-Class amps output power curve was narrowed down from that of the C-Class amps, to drive the standard speaker loads of 2 ohms stereo or 4 ohms mono.

The A-Class amps use nickel-plated, black plastic housing terminal blocks for power and speaker connections. The endplates have feet running their full width for ultimate mounting strength. The DD logo is CNC engraved identical to the C-Class amps. The circuit boards are single-sided to save our serious customers some cheddar where double-sided boards are not needed in the A-Class power ranges.

We took some time to overhaul the C-Class amps and incorporate some suggestions from our customers. We tried to keep all the good stuff, and tweek out the rest to give you some more stuff, like power and knobs. The old school internal design had to stay, like oversized transformers, silicon devices and capacitors. We especially like oversized silicon pairs, and we packed in the biggest pairs we could. Amps that aren’t totally stressed to make their power are generally happier amps to be around. You may have "significant others" around in which you can relate similar experiences.

The heat sink design follows the current Z series style, natural brushed aluminum with clear coat anodize finish. The new heat sink saves overall weight while increasing heat dissipation efficiency. These heat sinks won the coveted Hugo Proscutto Award for Spacial Industrial NeoClassical Design.

The crossover section was revised for greater flexibility. Each channel features separate high pass and low pass crossovers, with separate on/off switches. The range was expanded to include tweeter happy frequencies. The crossovers are the newest, high-tech, Izuka filters with da’kine 18dB/oct slopes.

Integration with OEM head units is quick and easy, the RCA inputs will accept hi-level signals direct, without additional Hi-Low converters. We kept the popular clipping indicator circuit which makes initial setup a simple task.

Customers need to drive a wider variety of sub configurations. The C-Class amps output power curve was broadened out, to drive speaker loads of 1 Ohm stereo or 2 Ohm mono. We kept the amps’ power the same at 4 Ohm mono, with the capability of increasing their power at 2 Ohm reactive.

The C-Class amps use gold plated terminal blocks for power and speaker connections. The endplates have feet running their full width for ultimate mounting strength. The DD logo is CNC engraved to save 2.157 grams of excess weight. We spare no expense for the highest power to weight ratio possible. The PCB board is reinforced with vegemite to eliminate vibrations and growling noises.

Revision "a" of the C-Class amps has all kinds of good stuff, more good stuff than ever before. We put in so much good stuff that we ran out of places to put more. We think these amps have the good stuff in the right places, and there really isn’t anything better than having the right places stuffed really full.

The MB-Class amps are moderate to medium power monoblock amplifiers engineered for low frequency applications.

The MBs incorporate the same kind of reliability and power based design, layout and construction as the M-Class amps. Both amps use the new Izuka 18dB/oct filters. The casing is the cool part. The MB1 (350w) and MB2 (700w) are designed for the ultimate stealth mounting; inside the sub enclosure. The faceplate is done rack-mount, Pro-Audio style, with two mounting holes overhanging each side of the amp. The case features thick aluminum side rails for heat dissipation. They both have their outputs incorporated as wires extending from the back side of the amp case. Simply use a pair of wire nuts to connect them straight to our subwoofers’ Direct Connect terminations. The 18dB/oct subsonic filter is internal and preset on both amps at Hz.

The MB amps were designed for very broad output curves, driving 4ohm and 2ohm mono loads. The MB1 and MB2 will allow an OEM level of cosmetic integration between sub-box and interior. They both, along with all of our other amps, have a clipping indicator LED on the chassis. You can use this to set the gain on your amplifier using the most demanding music you own; everything else will be a walk in the park for the amp and sub(s).

The MB1 is made as THE custom alternative to the powered vehicle-specific enclosures offered by other manufacturers. You can build an extremely efficient subwoofer enclosure as a DD consumer or dealer and we can provide the subwoofer made to handle that enclosure with more power than is available in your prefab alternatives. It makes 275wrms into a 4ohm load and 350wrms into a 2ohm load. While it’s not enough power to spit your windshield past the hood of your car, it is capable of sufficiently adding bass to your ride paired up with a 500 series subwoofer or even a pair of them.

The MB2 is there for the next level up bass-head that still doesn’t need 14 gigawatts in the trunk, but needs more than tree-fiddy! The MB2 has all the same functions and features as the MB1 except that it is longer and produces 500wrms @ 4ohms and 700wrms @ 2ohms. This amplifier is an excellent choice for a pair of 1500s or a single 2500a when you don’t have room on the outside of the box or in your trunk for the amp. When you have a loud-mouth customer; you can politically correctly tell them to shove it in their noise maker!

The M-Class Amps are monoblock amplifiers engineered for low frequency applications. The M-Class amps are made to be the soul of your audio system, bass pumping machines so powerful that your face could be ripped from your head in a momentary lapse of reason. Well, maybe that’s a bit of a stretch, but these amps offer strong power, logical controls and efficient design.

The M1a (1200w) is joined by the M3 (2400w). Their Power Ratings are continuous power at 1% THD+N, based on long term thermal ability of the amp circuit and heat sink. The dynamic power is based on short term peak output, a capability needed to follow heavy bass energy spikes engineered into most recordings. Both feature class D architecture for high efficiency and parts selected to run well below critical stress levels at rated power.

The M-Class amps accept high level signals through their RCA connections, saving the cost of outboard high-low level converters. Clipping indicator circuits are included to aid in proper setup of gains relative to volume levels. Terminal block connectors are used for power and speaker terminations. The M2 and M3 both using power blocks for up to 0 gauge wire.

The filters on the M1a and M3 are 24dB/oct on both the subsonic and low-pass sections. They are all strappable designs for applications arriving when a bunch of power isn’t enough and a boat load of power is in order. This also helps the guys that don’t quite have the cheese to buy a Z1a or Z2 all at once, but would like the ability to make that much power in increments. Gotcha covered!

The M1a and M3 share the award winning heat sink design with the C-Class and Z-Class amps. The curved fin design aids in setting up convection currents to effectively move heat away from the output rails. Critics agree that the Z Style heat sink is one of the true world marvels, rivaling the Wheel, Pizza and Hairless Pets.

Anyway, the guts of the M-Class is old school in thought; use good parts, use higher capacity parts than are needed, use a strong power supply, a clean preamp/xover section and good quality control. All amps go through their own burn-in time and full bench testing.

Digital Designs takes amp building seriously. We needed really good amps to put in our cars and we are lucky enough to be able to design our own. Talk about cool!

The S-Class amps have more of everything, more power, higher slope xovers, high grade pots and components. This amp class is aimed at the more complex installations where higher channel power, finer control and more precision is needed. The S-Class amp circuit uses higher capacity power supplies, bigger transformers, higher damping factor and higher current flowing PC Board's than the C-Class circuits. The S-Class brings higher end design into affordable price points.

The S4 is a non-symmetrical output, 4 channel power amplifier. It features two channels with 2 x 100 Watts of power, plus two channels with 2 x 200 watts of power. This allows the amp to make more power where it is needed most. The S4 can be configured to run a variety of systems.

The 100 x 2 channels have 24dB/oct high pass, variable from 20Hz - 500Hz. The crossover also uses a 10x frequency switch, this moves the crossover range to 200Hz to 5kHz. There are 4 calibrated dial markings to help frequency settings.

The 200 x 2 channel has the same 20-5kHz high pass and 50 - 5kHz low pass, 24dB/oct, with 10x frequency multiplier switch. Each filter has individual on/off switches for ultimate flexibility. A clipping indicator circuit is included to monitor real power conditions. The amp uses separate power supplies for each set of channels.

• 200 x 2 to power midrange door speakers with variable band pass, 2 x 100 to tweeters with variable high pass.
• 200 x 2 to power front component set or coax speakers, 2 x 100 to power rear fill.
• 100 x 2 to power front speakers, up to 700 mono to drive rear sub(s).
• 3 channel amp, 200 x 3 for surround sound use.
• 2 x 150 + 2 x 300 in 2 Ohm stereo use, to power double sets of coax/components.
• 2 x 175 + 2 x 350 in 1 ohm stereo use, to power more sets of coax/components.

With 3-way variable crossovers and two sets of bridgeable, staggered output channels, you can do anything a system design needs.

• True- Soft Turn On
• Quick Start Low Voltage Protect (10.8 v)
• Dual Thermal Protection
• Over Current Protection
• 100% all Tube Push/Pull Design
• Reserve Voltage Protection

Digital Designs recently introduced our Z line of Woofers, Amps and Battery. These products are single purpose designs with the sole goal of being the best tool for the job. No compromises, no cutbacks and no wimps.

The Z1a makes incredible amounts of power from stock electrical systems; it was designed to make the most power from limited current supplies. The high efficiency comes from paying close attention to every stage through the amp circuit. Multiple power supplies, high speed controller chipsets, efficient power devices and precise thermal management were key to the Z1a design.

These attributes make the Z1a at home in world record spl cars or high powered subwoofer systems where 400 pounds of battery bank aren’t possible. One Z1a amp can power several big-time subwoofers to stupid loud levels when called upon, or dazzle with rock solid control of complicated bass lines. Z1a's are limited production, high-end amplifiers for customers who want the best.